Use to wash your vehicle before you begin the masking process. PreWash™ is our specially formulated car wash soap that helps to remove dirt and impurities that could make it harder for your Dip to properly bond. Directions: Wash your vehicle at least 24 hours before dipping to allow for proper time to dry. For best results, mix 4 oz of PreWash™ with 1-2 gallons of water. Scrub vehicle to remove all surface dirt, debris, wax, sap, bugs, and grime. Rinse clean. Remember, vehicle must be 100% dry before beginning the prepping process to avoid trapping water or moisture.